Name of Pokémon: Dodrio
Typing: Normal/Flying
New Stats: 60/110/70/60/60/
110 (+10 Spe) (Gen 7 Stats)
New Abilities:
Limber (Replaces Run Away) / Early Bird
New Moves: Swords Dance, Jump Kick, Low Kick
Why It Should Be Picked: Gen 7 Dodrio would be amazing to have in Gen 3. Dodrio is already a just okay breaker, but faces major competition as Flying-type from Charizard, Salamence, Gliscor, and to a lesser extent, Swellow. With Gen 7's Speed boost and new move additions in Swords Dance and Jump Kick (plus the Gen 2 event move Low Kick), Dodrio can carve itself a niche. In Gen 3, the 110 Speed tier is SO much better than the 100 Speed tier, getting the jump on Salamence, Zapdos, Jirachi, and Cryogonal, and tying Gengar. Not having to rely on speed ties to get past those threats with a Banded set is a huge boon. Speaking of which, thanks to coverage in Low Kick/Jump Kick, Banded Dodrio sets with Double-Edge, Drill Peck, Fighting move, and Hidden Power Ground can easily threaten almost the entire tier, and if your opponent is scared enough to be forced out, you can surprise them with a Swords Dance and go to town. While it still has to compete with the premier Flying-type Salamence, Swords Dance and a 110 Speed tier gives Dodrio an actual reason to be used over it.
Name of Pokémon: Venusaur
Typing: Grass/Poison
New Stats: 80/100/83/80/100/82 (Stats rearranged)
New Abilities: Overgrow
New Moves: Shadow Ball, Rock Slide
Why It Should Be Picked: Venusaur is actually already pretty decent, but having to compete with Celebi and Breloom sucks, so lets lean in on what already makes it okay in hopes of making it even better. Thanks to Grass being a horrible type offensively in Gen 3, Venusaur was forced to run Sludge Bomb on its Defensive set, which is a fairly strong move, but only coming off of 82 Attack and Poison also sucking offensively made it passive. Now with 100 Attack, this makes its Sludge Bombs a lot more threatening, like being able to always 3HKO Celebi rather than only having a 10% chance to do so before. This buff also makes Swords Dance and Curse Venusaur a lot more threatening, actually being able to threaten Metagross even unboosted. Shadow Ball and Rock Slide are there to help with Gengar, Zapdos, and chipping Skarmory, since you lose HP Fire's effectiveness against it. The very slight Speed boost it gets lets it outspeed and put Milotic to sleep, which is very nice.
Name of Pokémon: Armaldo
Typing: Rock/Bug
New Stats: 70/125/100/45/79/71 (Stats rearranged, +1 Spe, -1 SpD)
New Abilities: Swift Swim
(Replaces Battle Armor)
New Moves: Rain Dance, Signal Beam
Why It Should Be Picked: Very simple change, but this thing with an actual Speed tier would be so nice. It can still do its very niche Rapid Spinning, Knock Offing, and wallbreaking it did before, but now it outspeeds Tyranitar, Claydol, and Metagross, which automatically makes Swords Dance and Banded sets way more threatening and lets it spin on more walls without having to take a hit first. Plus, with an actual Bug STAB move in Signal Beam, you get to run another Hidden Power, like Grass to chip Swampert. Also, with Swift Swim, you can use this on a Rain team or mess with TTar's Sand by setting up your own Rain on a Dual Dance set, I guess.
Name of Pokémon: Crawdaunt
Typing: Water/Dark
New Stats: 55/55/90/125/85/63 (Stats rearranged, +5 SpA)
New Abilities: Hyper Cutter / Shell Armor
New Moves: Hydro Pump, Agility
Why It Should Be Picked: Literally all Game Freak needed to do in Gen 3 to make this thing decent was swap its Attack and Special Attack before they released the game, but they didn't and this thing immediately dropped to NU. With it being tied for the 2nd highest Special Attack in the tier and a great offensive type combo in Water and Dark that threatens Tyranitar, Gengar, Celebi, Starmie, Aerodactyl, Gliscor, Jellicent, and Moltres, if it gets in, Crawdaunt will leave a dent in something. Agility also makes it a lot easier for it to put said dent in the opposing team. It's stonewalled by Blissey and even with improved 55/85 special bulk, its still quite frail, so it'll struggle to consistently get opportunities to run amok, but once it does, you'll have a lot of fun
Nerfs:
Name of Pokémon: Mr. Mime
Change: Baton Pass removed
Why It Should Be Picked: Very simple, but yeah the only reasons why Mime is broken are Baton Pass and Soundproof, so one of them has to go. Removing BP is a bit more harsh, but it gets the job done. It can at least still be a pretty decent Baton Pass recipient since something bulky enough to take a hit from it can't phase it out
Name of Pokémon: Ninjask
Change: Speed Boost replaced with Hyper Cutter
Why It Should Be Picked: Again, very simple, but Hyper Cutter is at least cool in that Salamence and Gyarados can't diminish its Swords Dance boosts before it Baton Passes out and makes the incredibly rare Offensive Swords Dance set a little more threatening